I use both. I like Japanese tools. If I am doing serious ripping by hand, or heavy duty crosscuts in say an oak beam, western is faster for me. I like Japanese for precision work - the pull stroke feels very natural.
I find it harder to cut square, compared to a backsaw. Then again, I'm not perfect with either. Maybe the fact that I played with my dad's carpentry tools 55 years ago means I'm more comfortable with traditional western saws.